If memory serves, the '83 through '86 Turbo Coupes were all fuel injected. The only difference in the turbo housings (Garrett T-3's) was the later('86?) provision of water cooling on the main housing. Other than that, they should all bolt togethor. Earlier 2.3 Turbo's (still T-3's if memory serves) were a blown through carbed set-up, and use a different turbo. '87's on up used an IHI turbo, which would require some mods.